The Role of Initial Recrystallized Texture on Dynamic Normal Grain Growth in an Interstitial-free Steel Sheet

Author(s)

Ryann E. Rupp, Eric M. Taleff

On-Site Speaker (Planned)

Ryann E. Rupp

Abstract Scope

Uniaxial tensile deformation of a Ti-added interstitial-free (Ti-IF) steel sheet at 850°C in the creep regime produces a distinctly different texture than room temperature deformation to the same strain. This is attributed to dynamic normal grain growth (DNGG) preferentially growing grains from the <111>//short transverse direction (STD) fiber texture at elevated temperature. This is desirable because a strengthening of the <111>//STD fiber increases the Lankford coefficient and improves deep drawability. The role of the initial recrystallized sheet texture on preferred DNGG orientations is investigated. This is achieved by comparing microstructures characterized using electron backscatter diffraction (EBSD) after both room- and high-temperature tensile deformation along different directions within the sheet. The initial recrystallized sheet texture is observed to influence microstructural evolution for both room- and high-temperature deformation. Understanding this effect may enable better tailoring of microstructures in IF steels for targeted applications.